求翻译：闲暇时间是构成旅游活动的必要条件。 随着社会生产力发展和劳动生产率的提高，使人们用于工作的时间相对减少，而闲暇时间不断增多。 闲暇时间的增多是导致休闲旅游需求趋旺的客观因素。 此外，由于计划生育政策的贯彻执行，社会保险事业和社会服务事业的发展， 使得家庭的生产职能与养老育幼的职能变小。 而家庭结构的日趋小型化、家庭职能女性生活方式的改变是什么意思？

Leisure time is a necessary condition to constitute the tourism activities. With the development of social productive forces and labor productivity, the relative reduction of people for work and leisure time continue to increase. Increased leisure time is an objective factor leading to the leisure a

Leisure time is a necessary condition for a tourism activities. Along with the social development of the productive forces, and improving the productivity of the people for the work of the time, and relatively less leisure time has continued to increase. Leisure time is the increase in leisure trave

The leisure time constitutes the traveling activity essential condition. Along with the social productive forces development and the labor productivity enhancement, causes the time which the people use in working to reduce relatively, but the leisure time increases unceasingly. Leisure time increase

Leisure time is necessary to constitute a tourist activity. As the development of social productive forces and the improvement of labour productivity, enable people to work less, and increasing leisure time. Leisure time increased demand for leisure travel is increasingly objective factors. In addit

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